Flawless Ruby in Diablo 4 is a precious gem that improves your socketed items. It can be used to produce a Flawless Ruby by means of a Ruby and some crafting materials. Also, the game's Jeweler can remove your gems without any breaks thereby making it possible to use them for different combinations.

Flawless Ruby Effects:

Weapons: Flawless Ruby gives Overpower Damage as a bonus when you insert it onto your weapon. This starts at +21 or -1%. In other words, if you put a Flawless Ruby in a weapon, you will deal more damage with the character’s Overpower ability. Such an attribute makes it an ideal choice for players who use heavy attacks to kill their enemies.

Armor: If you put Flawless Ruby in your armor, it will raise your Maximum Life. The increase varies from 0.07- %. This means that in the event that one has more health, he/she is likely to survive better during combats where they encounter many weak hits and healing won't suffice.

Jewelry: Adding Flawless Ruby on rings or amulets increases Fire Resistance. This ranges from 19.6 down to -1%. As we know, D4 places high importance on resistances because they reduce elemental damage taken from various sources, thus protecting our characters from dying too often due to fires set by their enemies.

Upgrading Flawless Ruby:

To make your gem stronger, you can enhance it up to another level called Royal Ruby. To upgrade, three gems of the same type must be invested plus gold (not less than some thousand). Once this gem has been improved, it becomes Royal Ruby which comes with even more benefits when added into items.

For three Rubies and eighteen thousand Gold you can craft a Flawless Ruby. You should go to the crafting interface after obtaining all necessary materials to create this gem. After accomplishing all of these steps, you can insert the Flawless Ruby into any socketed equipment.

In case you want to unsocket gems without destroying them, go to Jeweler. There are no limits to how many different combinations of gear you can try and optimize your character's build by using Flawless Ruby on different pieces of equipment.